Sanding machine



Nov. 20, 1934. v. M. HARDY SANDING MACHINE Filed June 1, 1929 2 Sheets-Sheet 1 V WQTX 5&2

ATTORNEY NOV. 20, 1934. v HARDY 1,981,385

SANDING MACHINE Filed June 1, 1929 2 Sheets-Sheet 2 INVENTOR ATTORNEY VNTUMMHAQDY Patented Nov. 20, 1934 UNITED STATES SANDING MACHINE Vinton M. Hardy, Northampton Township,

Summit County, Ohio Application 'June 1, 1929, Serial No. 367,683

6 Claims.

This invention relates to new and novel improvements in smoothing and polishing apparatus and. while intended for use generally wherever it may be advantageously applied, it is particularly adapted for use in a surfacing and polishing device and will be herein illustrated and described as applied to a floor sanding machine.

Objects of the invention are to provide a smoothing and polishing machine of simple,

durable construction which may be manufactured at a low cost and which will be economical in operation and very eflicient in use.

A particular object is to provide a floor sanding machine in which sand paper or other convenient form of abrasive is carried by blocks and. to provide means for rapidly reciprocating the blocks whereby the entire surface of the floor may be smoothed thereby eliminating the necessity of hand labor on the area of the floor immediately adjacent the wall or base board.

An additional object is to provide a floor sanding machine having reciprocating blocks carrying an abrasive and to provide adjustable stops for engaging the wall or other structure for restricting the movement of the blocks to the floor area and to thereby provide means for finishing the entire surface of the floor without bringing the blocks into contact with the wallsor the woodwork.

Another object is to provide a machine having reciprocating blocks normally held above the'work and to provide conveniently operable means for bringing the blocks into operative contact with the work thereby providing a sanding machine which will not unduly wear the floor in one place when unintentionally left in operation.

The accomplishment of the above and additional objects is attained by the novel construction, combination and arrangement of parts hereinafter described and illustrated in the accompanying drawings, in which there is shown a preferred adaptation of the invention, it being understood that the invention is not confined to the particular form of apparatus shown or restricted to the particular function described and that changes and modifications may be made or resort had to substitutions which come within the spirit of the invention as set forth in the appended claims. a

In the drawings like characters of reference are employed to designate like parts as the same ap pear in any of the several views and in which:

Figure 1 is a top plan View of a fioor'sanding machine constructed in accordance with this in- 55 vention,

Figure 2 is a longitudinal, vertical sectional view taken as indicated by the lines 2-2 of Figure 1,

Figure 3 is a horizontal, sectional view taken as 0 indicated by the lines 3-3 of Figure 1,

Figure 4-. is a side elevational view of a floor sanding machine constructed in accordance with this invention,

Figure 5 is a cross sectional view taken as indicated by the lines 5-5 of Figure 2.

Figure 6 is a cross sectional View showing a preferred form of abrasive holding member used in carrying out the invention, the same being taken as indicated by the lines 6--6 of Figure '7.

Figure 7 is a perspective view of same.

Proceeding now to a detailed description of the invention with reference to the particular adaptation thereof disclosed in the drawings, the numerals 6 and '7 are used to denote the side members of my improved device. The members 6 and '7 are arranged in parallel, spaced relation and are connected by the cross members 8 and 9 which are secured to the lower side of each of the side members 6 and '7. A relatively wide cross member or motor support 10 is suitably secured to the upper edges of the side members 6 and '7 so as to extend therebetween. The numeral 12 is used to denote a cross member which is shown in the drawings as rectangular in cross sectional shape and is provided with cylindrical end portions which are journaled in suitable bores 12a in each of the side members 6 and '7, at points adjacent the rear end of the machine. I

Suitable guides or slideways are secured to the cross member 12 and project forwardly therefrom. In the drawings I have shown two guideways each composed of rectangular members 13, 14, 15 and 16. The rear ends of the members 15 and 16 are positioned in parallel spaced relation to each other on the upper face of the member 12.

A cross member 1'7is positioned on the members 16 and 15 and is disposed in the same radial plane with the cross member 12. The members 13 and 14 are positioned on the cross member 1'? in parallel, spaced relation to each other and with the members 13 in parallel relation to the member 16 and the member 14 in parallel relation to the member 15. The side members are secured to the cross member 12 by means of the bolts 18. The members 13, 14 and 15 and 16 are likewise connected at the forward end thereof to the cross member 19 by means of the bolts 20, thereby'forming a double slide-way which projects forwardly beyond the forward edges of the side members 6 and '7.

The numerals 21' and 22 are used to denote blocks which are provided with suitable means 16, and the other end of which is received between the members 14 and 15. It will thus be seen that the blocks 21 and 22 are mounted for longitudinal sliding movement in the double slide-way hereinbefore described.

The numeral 27 denotes a shaft which is journaled in suitable bearings in the frame members 6 and 7 so as to extend therebetween. The shaft 2'7 is provided with oppositely disposed cranks 28 and 29. The pitman 30 is journaled on the crank 28 and is secured to the block 22 by means of the hinge 31 or other suitable means. A pitman 32 is journaled to the crank 29 and is likewise secured to the block 21 by means of the hinge 33. The shaft 27 projects laterally over the side. member 6 and a sprocket wheel 34 is operatively secured thereon.

An electric motor 35 is mounted on the cross member 10 with the motor shaft 36 in parallel relation to the shaft 27. The shaft 36 projects laterally beyond the plane of the side member 6 and a sprocket wheel 37 is mounted in the outwardly projecting end of said shaft so as to operate in the same plane with the sprocket wheel 34. A sprocket chain 38 operatively connects the sprocket wheels 37 and 34. a

The side members 6 and 7 are provided at the forward ends thereof with upwardly projecting portions 6a and 7a. The portions 6a and 7a are provided with alined bores in which are rotatably mounted the trun'nions39aand39b,on the member 39/ The member 39 is thus rotatably mounted to extend across the forward end of the frame. The member 39 is provided with a radial arm 40 which projects downwardly and forwardly therefrom. The arm 40 is provided on the lower end thereof with a wheel 41. A plate 42 is positioned on the slide members 13 and 14 with the wheel 41 in direct engagement therewith. The springs 42a. normally hold the forward end of the slide-way in a raised position with the blocks 21 and 22 out of contact withthe work. 'A rod 43 is suitably secured to the lever 40 at'a point intermediate its length so as to extend rearwardly therefrom. The rod 43 is suitably mounted in the eye 44 which is secured to the lower face of the platform 10 so as to project downwardly therefrom.

The numeral 46 is used to denote a handle which is detachably secured to the rear ends of the side members 6 and 7. A rod 45 is hingedly secured to the forward end of the rod 43 withthe upper end thereofoperatively secured to'the lever 47 which is fulcrumed on one of the side members of the handle 46 wherebythe lever 4'7 may be conveniently engaged by the hands while using the portion 46a of the handle 46, to move the rods 45 and 43 rearwardly thereby swinging the arm 40 to a downward position and causing the wheel 41 to engage the plate 42 and move the slideway downwardly, thus forcing the blocks 21 and 22 into an operative position. The lever 4'7 upon being released will be immediately moved forwardly by the action of the springs 42a thus automatically moving the blocks 21 and 22 upwardly out of contact with the work.

The numeral 48 is used to denote a metal strip having a central portion which extends across the forward end of the machine and rearwardly projecting, parallel portions 48a and 48b which are positioned flat against the opposite side members of the machine.

The portions 48a and 481)- are provided with elongated slots 49 and suitable bolts or screws 50 are positioned through said slots and secured in the side members to securely hold the member 48 in position. The arrangement is such that the screws 50 may be operated and the member 48 adjusted longitudinally of the frame. The member 48 is provided on the forward side thereof with suitable wheels 52 which are adapted to engage the wall or other suitable structure to prevent the blocks 21 and 22 from coming in contact with the base board.

The flat strip 53 extends across the upper side of the member 48 in a plane adjacent the forward end thereof so as to connect the portions 48a and 48b. Suitable thumb screws 54 are secured in the member 53 and are entered in the elongated slots 55 in the straps 56. The straps 56 are thus adjustably secured to the member 53 so as to project laterally from each side of the machine.

A wheel 56a is operatively secured to the out-, wardly projecting end of each of the straps 56. Like straps 58 are secured to the upper face of the platform 10 by means of the thumb screws 59 i which are entered through elongated slots in the straps 5S andare secured in said platform.

The straps 58 are provided on the outwardly projecting ends thereof with suitable wheels 60. The wheels 52, 56 and 60 are mounted on vertical axes, thereby providing an adjustable step which will engage the walls of a structure to confine the operation of the blocks 21 and 22 to the area of the floor,

The handle 46 is detachably secured in the U-straps 61 which are secured to the rear end of each of the frame members 6 and 7. Similar straps ,62 are positioned in each side of the machine whereby the handle 46may be quickly and conveniently removed and positioned on either side of the machine.

In use, a suitable abrasive 23 is detachably se-' cured to the lower face of the blocks 21 and 22 and the motor 35 is operatively connected to a source of electrical'energy. The stops 52, 56 and 60 are adjusted to prevent the blocks 21 and 22 from contactingwith the wall orother structure. The lever 47 is grasped with the handle 46a and is operated to move the lever 40 rearwardly,'thus depressing the forward end of the slide-way and bringing the blocks 21 and 22 into forced contact the pressureof the blocks 21 and 22'may be I easily and conveniently regulated by regulating the pressure on the lever 4'7, it will be seen that I have provided emcient, conveniently operable means for finishing or polishing the floor.

It willbe seen that with the floor boards disposed at a right angle to the base board that the straps 48a and 49bmay be adjusted whereby the wheels 52 will contact with the wall so that the blocks 21 and 22 maybe operated in an area extending exactly to the base board without contact therewith. When the floor boards are disposed longitudinally of the Wall the handle 46 may be removed from the loop 61 and positioned in the loops 62 on'either side of the machine and. a chain or other flexible member substituted for the rods 43 and 45, thus providing means for cleaning and polishing the entire corner area of the floor. r

The blocks 21 and 22 may be of any suitable construction and the abrasive 23 or polishing material may be secured thereto in any suitable manner. In Figures 6 and '7 there is shown .a

preferred form of the block 21a which is provided with inclined side walls 211) and 210. The side walls 21b and 210 are each provided with a horizontal groove 21d which extends longitudinally thereof. The numeral 21e is used to denote a rod, one of which is secured to each of the side walls 21b and 210 by means of the hinges 21f so as to be movable to and from the groove 2101. The block 21a is provided with a bore 219 which extends laterally therethrough. A coil spring 21h is positioned in the bore 21g with the ends thereof secured to the rod 212. The spring 2117 thus yieldably holds the rods 21a in the grooves 21d. Sand paper, emery cloth or other abrasive mate rial 23 is positioned over the bottom face of the block 21a. The handle 217' on each rod 21c is operated to move the rods 21c out of the grooves 2151. The abrasive is then positioned under the rods and the handles 219' released. The spring 212) normally holds the rods 216 in said groove. The abrasive 23 will be forced into the groove 21d and will be securely held on said block.

While I have illustrated and described the invention as applied to a sanding or abrading machine, any suitable tool or abrading element may be attached to the blocks 21 and 22 or to the slide members 26 depending upon the nature of the work to be done.

It will also be readily seen that a polishing pad or brush may be attached to the blocks 21 and 22 and the machine used for polishing waxed floors and similar surfaces.

While I have shown and described a machine having two reciprocating blocks, the invention is not limited to any particular number of blocks and may be constructed with one, two or more blocks in accordance with the function and result desired.

Having thus illustrated my invention and described the same in detail, what I claim as new and desire to secure by Letters Patent is:-

1. In a device of the class described a suitable frame, a slideway, means pivotally mounting the rearwardly presented end portion of said slideway to the frame, blocks operatively mounted in said slideway, means to reciprocate said blocks, spring means normally holding said slideway in a raised position and means operable to depress said slideway and bring said blocks into operative contact with the work.

2. In a device of the class described, a frame, a slideway, the rear end of said slideway being pivotally mounted in said frame for movement on a horizontal axis, blocks operatively mounted in said slideway, yieldable means normally holding the slideway in a raised position, and means operable to depress the forward end of said slideway and bring said blocks into forced contact with the work.

3. In a device of the class described, a frame; a slide-way support having one end thereof hingedly mounted in said frame for movement on a horizontal axis, the other end of said slideway support projecting beyond the forward end of said frame; blocks mounted in said slide-way support for longitudinal sliding movement therein, means to attach an abrasive element to said blocks, yieldable means normally holding said slide-way support in a raised position, means to swing said slide-way support downwardly and bring said blocks in operative contact with the work and means to reciprocate said blocks.

4. In a device of the class described, a suitable frame, a slideway pivotally secured therein at a point adjacent the rear end thereof, said slide way extending forwardly in said frame and projecting from the forward end thereof, working elements operatively mounted in said slideway, means to reciprocate said elements, yieldable means normally holding the forward end of said slideway in a raised position and means operable to depress said slideway and bring said elements into operative contact with the work.

5. In a device of the class described, a frame, a double slideway, one end of said slideway pivotally mounted in said frame for movement on a horizontal axis, blocks operatively mounted in said slideway, a working element carried by each block, a horizontal shaft journaled in said frame, said shaft provided with oppositely disposed cranks; a pitman operatively connecting each crank to one of said blocks, an electric motor mounted on said frame, driving means operatively connecting said crank to said motor, means normally holding the free end of said slideway in a raised position and means to depress said slideway and bring said working elements in operative contact with the work.

I 6. In a device of the class described, a frame, a slide-way hingedly secured therein for limited vertical swinging movement working elements slidably mounted therein, means to raise and lower said slide-way, means to reciprocate said elements and adjustable stops mounted on said frame, said stops adapted to engage a wall to limit the position of said blocks relative thereto.

VINTON M. HARDY. 

